On expansion of (a + b)2 and its corollaries 1. Expand the squares of the following: (a) 4x + y (b) 5a + 3b
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Step-by-step explanation:
(a) 4x + y
(4x + y)²
(4x)² + 2(4x)(y) + (y)²
16x² + 8xy + y²
(b) 5a + 3b
(5a + 3b)²
(5a)² + 2(5a)(3b) + (3b)²
25a² + 30ab + 9b²
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